Device for transmitting power.



BEST AVAZLABLE COP" PATEN,T ED NOV. 1

G.F.PBARSON.

T DEVICE FOR TRANSMITTING POWER.

APPLIUATION FILED JAN. 29. 1904.

2 SHEETS-SHEET 1.

N0 MODEL.

A TTOHNE YS To MODEL.

BEST AVNLABLE Q PATENTED NOV. '1, 1904. 0. F. PEARSON.

DBVIGE'FOR TRANSMITTING POWER.

APPLICATION FILED JAN. 29. 1904."

2 SHEETS-SHEET 2.

INVENTO/i I V (242i ZPGQZJOZZ' A TTOH/VE Y8 BEST AVAILABLE coe UNITEDSTATES Patented November 1, 1904.

PATENT OFFICE.

DEVICE FOR TRANSMITTING POWER.

SPECIFICATION forming part of Letters Patent No. 773,977, dated November1, 1904 Application filed January 29, 1904. Serial No. 191,083. (Nomodel.)

To all whom iz5 may concern.-

Be it known that I, CARL F. PEARsoN, a citizen of the United States, anda resident of Chicago, in the county of Cook and State of Illinois, haveinvented a new and Improved Device for Transmitting Power, of which thefollowing is a full, clear, and exact description. Y My inventionrelates to a device for transmitting power, commonly termed planetarygearing. I

The objects of my invention are to provide a power-transmitting devicewhich shall be capable of producing variable speeds and-reversing'.

Further objects of myinvention are to secure these results with acomparatively simple construction and with the assurance of efficientand absolutely certain action.

Further objects will appear in the course of the subjoined description.

Reference is to behad to the accompany-' ing drawings, forming apart ofthis specifia cation, in which similarcharacters'of refer ence .indicatecorresponding parts in all the figures. V

Figure 1 is a cross-sectional view taken on I a line parallel with theshaft of the main part of the device without the brake 'members.\ Fig. 2is a sectional view taken on the line 2 2 of Fig. 1. .Fig. 3 is an endview of the whole apparatus, showing certain parts in section; and Fig.is a fragmentary plan view showing the braking devices.

In the drawings, which show a preferred form ofmy invention, the numeral1 indicates the driving-shaft; 2, a gear secured thereto and meshingwith a second gear, 3, mounted on a stud 4:, which'is supported at bothends and: has a bearing in the casing 5, loosely journaled on the shaft1 and having an extension or sleeve carrying at its end thetransmission-gear or other device 6. Meshing with the gear 3 is aninternal gear 7, formed upon the drum 8, which is loosely journaled uponthe sleeve projecting from the casing 5.

9 represents a gear which is either secured to the gear 3 or may beintegral with it and is mounted upon the stud {i in the same manner asthe gear 3.- This gear 9 meshes with a gear 10, mounted upon a stud-l1,whichis' also journaled in the casing 5, and it meshes with an internalgear 12 upon asecond drum 13, which is freeto turn and is looselyjournaled upon a sleeve 14 upon a third drum 15. 16 is .a gear securedto said sleeve 14 and meshing with the gear'lO, as shown in Fig. 2. Uponthe drum 13 is a cylindrical pro j'ection'20, as shown in Figs. 1 and 3,and upon the drum 15 is a similar projection 21, extending in theopposite direction. ,Between these two projections is a band 22, securedto the projection 21 by means of a stud'or other device23. i

This completes the description of the gearingof my device in thepreferred form shown in the drawings; but it is to be understood that Ido not desire to limit myself to the exact construction'shown, as itwill be obvious that many modifications may be made by a skilledmechanic without departing from the scope of my invention as' defined inthe claims. s I

As the device is shown, arrows'have been placed upon various parts toindicate the direction of motion of the parts under normalcircumstances, and these arrows will not'require description. It will beseen that when the device is operating as indicated by these arrows thecasing 5, and therefore the transmission-gear 6, will not be in motion.In

order to set these parts in-motion and trans- A mit power to the desiredpoints, it is necessary to stop the motion of the drums 8, 13,-or 15, orto connect them up in certain ways which will be described. This isaccomplished by the mechanism which will now be referred to. Upon thesethree d-rumsare placed brakebands 25, 26, and 27, as shown in Figs: 3and 4. These bands are operated by means of a hand-lever 30, connectedwith a longitudinally-movablebar 31, provided with a rack 32, whichmeshes with a pinion 33, mounted upon a shaft 3% and designed to rotatesaid shaft. Upon the shaft 34 are formed or se-. cured a number ofcamsurfaces, in this case shown as three in number, (indicated by 35,36, and 37, respectively.) These cams are shaped as shown and havedepressed surfaces ends. Upon each of these cams rests a roller,(indicated by 41, 42, and 43, respectively.) These rollers are journaledin frames 44, 45, and 46, which are pivoted to links 47, 48, and 49.These links 47, 48, and 49 are pivoted to the brake-bands 25, 26, and27, respectively, as shown. The frames 44, 45, and 46 are adjustablysecured and pivoted to the other ends of the brake-bands, as indicatedat 50. It will be seen from this description that the operation of thelever 30 will turn the shaft 34, and the cams will operate in such amanner as to bring the rollers to rest in the surfaces 38 39 40, andthereby tighten the brake-bands as desired in an obvious manner. In theouter end of the sliding bar 31 is a slot 52, provided with acurvedoffset 53. Into this ofi'set is set a stud 54, secured to a band 55 upona hub 58. In the upper end of this band is a second stud 56, running ina guideway 57. The hub 58 is provided with a conical surface 59 and isadapted to come into contact with and move an adjustable bolt in the endof a lever 61, which, with a link 62, forms a toggle-joint and isconnected at two points to the band 22.

The operation is as follows: In the position shown by Fig. 3 thehand-lever 30 is vertical and the parts are in such position that noneof the brake-bands is tightened and the hub 58 is in its outermostposition. Therefore the parts will operate as indicated by the arrows inFig. 1. Upon shifting the hand-lever 30 to the position shown by thedotted line S the shaft 34 will be rotated forty-five degrees and theroller 41 will be brought up upon the cam 35 and will rest in thedepressed surface 38 at the top of said cam. This will cause the band 25to be tightened and the rotation of the drum 8 to bear-rested. When thisoccurs, the gear 3, meshing with the internal gear 7 upon the drum 8,will be caused to rotate around within the drum 8, carrying with it-thecasing 5 and causing the rotation of the transmission member 6 at a slowspeed in the direction indicated by the arrow on the shaft 1. It isto-be understood that the driving-shaft 1 always ro tates in thedirection indicated by the arrow applied to it. Upon shifting the lever30 to the position indicated by the dotted line M the shaft 34 will beturned ninety degrees and the roller 43 brought into contact with thecam 37 and into the surface 40, which will now be at the top of theshaft. The effect of this will be to tighten the band 27 upon the drum15 and stop the rotation of the drum 15, and therefore of the sleeve 14and gear 16. The effect of this, it is obvious, will be to cause thegear 10 to rotate around the gear 16 and carry with it the casing 5, inwhich it is journaled, andlikewise the transmission member 6 in thedirection indicated by the arrow on the shaft 1. Owing to the sizes ofthe gears illustrated,

this rotation will be at a higher speed than.

that before described. Of course before the tightening of the band 27the roller 41 -will be the direction.

BEST AVAlLABLE CC)? removed from the surface 38, thereby loosening theband 25 upon the drum 8. Upon shifting the lever 30 through another areof ninety degrees into the position indicated by the dotted line H thethree rollers 41, 42, and 43 will be permitted to remain in their lowestposition, as indicated in Fig. 3, and all the brake-bands will be loose;but the bar 31 will be forced to its outermost position, and the slot 53therein will operate upon the pin 54 .and force the hub 58 inward,whereby its conical surface 59 will contact with the screw 60 and forceoutward the lever 61, consequently striking the toggle-joint formed bythe lever 61 and the link 62, and thereby force the band 22 intointimatecontact with the projection 20 and the drum 13. This will secure the twosurfaces 20 and 21, and therefore the two drums 13 and 15, together, butwill not necessarily stop the rotation. of either. The effect of thiswill be to cause the internal gear 12 and the external gear 16 to rotatetogether, and therefore stop the rotation of the gear 10 on its axis.The gear 9, meshing with the gear 10, will also be stopped, and likewisethe gear 3, which is not free to rotate independently of the gear 9. Theeffect of this stoppage of the members will be to cause the gear 3 torotate by the shaft 1, taking with it the cas' ing 5 and transmission.member 6, as well as all the drums. This motion will be at a high speedrelative to the other speeds produced, as above described, on account ofthe absence of any reducing-gearing which is present in the operationsdescribed above. Of course upon reversing the lever the reverseoperation will take place, and the transmission memher 6 may come to astop when the lever 30 is in the position shown in Fig. 3, and uponcarrying the lever 30 beyond that position to that indiEated by thedotted line B the third cam 36 will be brought into position to act uponthe roller 42, and when the surface 39 on that cam is brought far enougharound to hold the roller in it's elevated position the brake-band 26upon the drum 13 will be tightened, and the effect of this will be tostop the drum 13 and of course the internal gear 12,

whereupon the gear 10 meshing therewith will be caused to rotate withinthe drum 13,

carrying with it the casing 5 and the trans mission member 6 in adirection opposite to the arrow shown on the shaft 1 and'to the motionof the transmission member 6 in each of the three cases described above.

It will be seen from this description that with a device constructed asshown and described or in an analogous manner three speeds and reversemay be obtained and that the operation of a single lever in the ordinarymanner will secure these changes of speed and It will also be seen thatthe shape of the surfaces 38, 39, and 40 is such as to hold the rollers41, 42, and 43 securely in position, and thus enable the lever to be setin any-desired position and left for any length of time.

The invention represented herein is exceedingly efficient and capable ofa wide range of use upon various kinds of machinery.

The relative sizes of the various gears have not been stated, as it isobvious that they" will be varied according to the speeds desired, butfor ordinary usesisizes proportional to-those illustrated 'could beemployed with advantage.

Having thus described my invention,-I claim as new and desire to secureby Letters Patent -1. A planetary-gearing system, comprisingadrivingshaft,a transmission memb.er, means for transmitting motion fromsaid shaft to said member at four different speeds and-in twodirections, said means consisting of two setsofintermeshing gears, oneof said sets comprising a gear fast on the driving-shaft,two gears, oneof each set, being rigidly secured together, and a plurality of drums,two of said drums having internal gears each meshing with a gear ofoneof said sets, and the gears of each set being in the same plane.

2. 1 In a planetary-gearing system, the combination of a driving-shaft,a transmission member, a casing carrying the transmission member andloosely Journaled on Saidshaft,-

three drums, means connected to saiddrivingshaft for driving said drumsn two directions, means for arresting either drum, and means forcoupling two of said drums togetherjto prevent their rotationindependent of each other, said last two means comprising brakes, anexpansible band, ashaft, cams and a pinion on said shaft, connectionsfrom said cams to said brakes, a rack meshing with said pinion, andconnections from said rack to said expansible band. i

3. In a planetary-gearing system, the combination of a driving-shaft, atransmission member, three drums,'means connected to said driving-shaftfor driving said drums in two directions, means for transmitting powerfrom said drums to said transmission member, and means for arresting anyofthe drums independently of the others, thereby changing the speed ordirection of rotation of said transmission member, said last-named meanscomprising three brakes, a shaft, a series of cams on said shaft and atoggle-joint connected from each cam to a brake, each cam having adepressed surface to hold the brakes in operative position.

4. In a planetary-gearing system, the combination of a driving-shaft, atransmission member, three drums, means connected to said driving-shaftfor driving said drums in two directions, means for transmitting powerfrom said drums to said transmission membeigmeans for arresting any ofthe'drums independentlyof the others, and means for connecting two ofsaid drums together to prevent their moving independently of each other,said last drums each having an internal'gear, a transbination'of'adriving-shaft, a plurality of drums, a transmissionmember, a'hand-lever, means for transmitting motion from said shaft to said drumsand connections to said drums from said hand-lever comprising a seriesof cams and toggles for first causing the power to be transmitted at aslow speed from said shaft to said transmission'member, then increasingthe speed, and finally further increasing the speed by moving said leverin one di- 30 rection, and stopping and reversing the mo- -tion of saidmember by a reverse motion of said lever.

6. In a planetary-gearing system, the combination of a driving-shaft, aplurality of 5 mission member, a'lever, means for transmit-' ting motionfrom said shaft to said drums, said means consisting of two gearsmeshing w1theach other, one of thembeing mounted '9 on the shaft, threeintermeshing gears, one of the latter being rigidly connected with oneofthe two first-mentioned gears. and connections to'said drums from saidle ver for-first causing the power to be transmitted at a slow speedfrom said shaft to said transmissionmember, then increasing the speed,and finally furtherincreasing the speed by'moving said lever in onedirection and; stopping and reverse motion of said lever. a

7."In a planetary-gearing system, the combination of a driving-shaft, atransmission member, a plurality'of drums having internal gears, alever, and means for transmitting 5 motion from said shaft to saiddrums; said versing' the motion of said member by a re-' meansconsisting of two sets of gears, the gears of each set being located inthe same plane and one of said sets consisting of two gears,

one being mounted upon the shaft, and the other set of three gearsconnected with one of the gears of said first set, a gear of each ofsaid sets having engagement with one of said internal gears, andconnections from the le-' ver to the drums for causing the power to be 5transmitted at varying speeds in the same direction from the shaft tothe transmission member when the lever is moved in one direction.

8. A planetary-gearing system, comprising 1 20 a driving-shaft, atransmission member, means for transmitting motion from said shaft tosaid member at four different speeds, said means comprising two sets ofintermeshing gears, one of said sets including a gear fast on the I25driving-shaft, two gears, one belonging to each of said sets, beingrigidly secured together, and a plurality of drums, two of said drumshaving internal gears each meshing with the gear of one of said sets. '73 9. A planetary-gearing system, comprising fortransmittin g power fromsaid shafts to said member at three different speeds in one directionand also in the reverse direction, said means comprising two sets ofplanetary gears, a plurality of drums, means for operatively connectingsaid-drums with said gears, brakes for said drums, arotatable shaft, aplurality of cams on the last-named shaft, means engaging one brake whenthe last-named shaft is turned through a certain angle, and meansconnected with another of said cams for tightening another brake whenthe shaft is turned through a larger angle.

10. Aplanetary-gearingsystem,comprising a driving-shaft, a transmissionmember, means for transmitting power from said shaft to said member atthree different speeds in one direction and at one speed in the reversedirection, said means comprising two sets of planetary gears, aplurality of rotatable drums, means for operatively connecting saiddrums to said gears, brakes for said drums, a rotatable shaft, a cam onsaid shaft, a lever arranged to be engaged and operated by said cam, anda link connecting said lever and said brake.

11. Aplanetary-gearirigsystem,comprising a driving-shaft, a transmissionmember,means for transmitting power from said shafts to said member atthree different speeds in one direc tion and also in the reversedirection, said means comprising two sets of planetary gears, aplurality of drums, means for operat vely connecting said drums withsaid gears, brakes for said drums, a rotatable shaft, a plurality ofBEST AvAMeLE ooz cams on the last-named shaft, means engaging one brakewhen the last-named shaft is turned through a certain angle, and meansconnected with another of said cams for tightening an- 4 other brakewhen the shaft is turned through a larger angle; each of saidlast-mentioned means comprising a cam on the last-mentioned shaft, alever arranged to be engaged and opfor transmittingpower from saidshafts to said erated by the cam, and a link connecting the member atthree different speeds inone direc- 5 tion and also inthe reverse,direction, said means comprising two sets of planetary gears, aplurality of drums, means .for operatively connecting said drums withsaid gears, brakes for said drums, a rotatable shaft, a plurality ofcams on the last-named shaft, means engaging one brake when thelast-named shaft is turned through a certain angle, means connected withanother of said camsfor tightening another brake whenthe shaft is turnedthrough a larger angle, and meansfor reversing the motion of saidtransmissionmember when the. shaft is turned in the opposite direction.

In testimony whereof I have signed my name 5 z to this specification inthe presence of two subscribing witnesses, 1

I CARL 1r. PEARSON.

' Witnesses V Gus E. JOHNSON, MAURICE TALIN.

